Hemizygosity is the term used to describe the state of a gene that has no allele on the opposing chromosome
Indicate whether the statement is true or false
TRUE
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The physiologist J. Soum surgically sealed off an air sac of a pigeon and injected carbon monoxide into it. What did he observe and conclude from this experiment?
A. The bird died demonstrating the toxicity of this gas. B. The bird was fine, demonstrating this gas is not actually toxic. C. The bird died, indicating diffusion of gases across the air sac into the blood. D. The bird showed no ill effects, indicating diffusion of gases from the air sac into the blood. E. The bird showed no ill effects, indicating gases do not diffuse from the air sac into the blood.
The cells that actually secrete antibodies are
A. plasma cells. B. natural killer cells. C. phagocytes. D. T cells.
How does the effect of a sudden drop in predator population compare to the effect of a sudden drop in prey population? a. A sudden drop in predator population results in an increase in prey population,while a sudden drop in the prey population results in a sudden drop in thepredator population
b. A sudden drop in the predator population results in a corresponding drop in theprey population, while a sudden drop in the prey population results in a suddendrop in the predator population. c. A sudden drop in the predator population does not affect prey populationnumbers, but a sudden drop in the prey population will result in a sudden drop inthe predator population. d. A sudden drop in the predator population results in a corresponding suddenincrease in the prey population, but a sudden drop in the prey population doesnot affect the predator population.
The replacement model is supported by
evidence from a. the fossil record. b. DNA sequencing data from mitochondria. c. DNA sequencing data from chromosomes. d. global climate change patterns. e. all of these.